Casing centralizer having straight blades



FIG. 1 is a perspective view of a casing centralizer having straight blades showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right-side elevational view thereof;

FIG. 5 is a left-side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view.

The broken lines showing a cylinder are included for the purposes of illustrating only and form no part of the claimed design. 

The ornamental design of casing centralizer having straight blades, substantially as shown and described. 